Full list of all 93 Assassin's Creed Odyssey achievements. It takes around 80-100 hours to unlock all of the achievements in the base game on Windows.
The base game contains 50 achievements, and there are 5 DLC packs containing 43 achievements.
Recover the Cyclops's eye from a goat on Kephallonia.
Defeat all the Cultists of Kosmos.
Complete Episode 9 + Epilogue.
Upgrade your Spear to Tier 6.
Complete Episode 8.
Unveil all sub-regions of Greece.
Complete all underwater location objectives.
Defeat Medusa.
Complete Xenia's questline.
Complete the Daughters of Artemis questline.
Complete Episode 7.
Complete the Hippokrates questline.
Complete the Olympic questline.
Outwit the Sphinx.
Discover Atlantis and speak with Pythagoras.
Complete Episode 6.
Perform an Overpower Attack with every weapon type.
Complete Episode 5.
Fully crew the Adrestia with Legendary Lieutenants.
Become the first Mercenary.
Equip a Legendary Armor set.
Defeat a full cluster of Cultists of Kosmos.
Upgrade the Adrestia to Legendary Status.
Acquire a Tier 3 active Ability.
Complete Episode 4.
Engrave a Legendary Item with a Legendary Effect.
Defeat a Mercenary in the Arena.
Become Champion of the Arena.
Defeat the Cyclops.
Reach Level 50.
Recruit and assign a Legendary NPC for your ship.
Complete 20 Quests on Pephka, Obsidian and Abantis islands.
Defeat the Minotaur.
Complete Markos's questline.
Cleave a ship while having an all-women crew.
Equip 1 Legendary melee weapon and 5 Legendary armor pieces.
Complete Episode 3.
Complete 20 Bounties, War Contracts, or Naval Quests from Message Boards.
Win your first on land conquest battle in any region (excluding Megaris in Hero's Journey).
Kill the Leader of any Region with Low Resources, other than Megaris.
Raise your Bounty to the maximum level.
Sink your first Epic Ship.
Complete Episode 2.
Spend the night with another character.
Acquire and equip your first Legendary item.
Engrave your first item.
Upgrade the Adrestia for the first time.
Cleave a ship in half.
Complete Episode 1.
Complete the Battle of 300.
Acquire the Sword of Kings
Land a Rush Assassinate that chains 4 times with the Blade of the Lion
Kill the Makedonian Lion
Secure your bloodline
Kill all the Ancients in the Order of Dominion in Messenia
Heal by getting 10 headshot kills while you have the Golden Harbinger equipped.
Heal by parrying 10 times with the Judgment of the Lion.
Continue the bloodline.
Kill all of the Ancients in the Order of the Storm in Achaia.
Discover the truth about Darius' past
Kill all the Ancients in the Order of the Hunters in Makedonia
Kill 10 enemies using the Fury of the Bloodline Ability.
Kill 10 enemies using the Rapid Fire ability.
Set 10 enemy ships on fire.
Kill 10 enemies using the Death Veil ability
Complete The Heir of Memories
Complete Every Story Has an Ending
Complete The Image of Faith
Complete Old Flames Burn Brighter
Complete The Show Must Go On.
Complete Divine Intervention.
Complete A Brother's Seduction
Complete A Poet's Legacy.
Complete One Really, Really Bad Day
Complete The Daughters of Lalaia
Complete A Friend Worth Dying For
Forge the 3 Legendary Weapons.
Defeat the Hekatonchires.
Completely fill the Knowledge Sequence.
Collect all the Keeper's Insights in Episode 3.
Kill 10 Isu Soldiers with the Blessing of Kronos enhancement.
Dethrone the king.
Close all Tartaros Rifts.
Defeat all of the Fallen.
Collect all the Keeper's Insights in Episode 2.
Defeat Cerberos.
Win the conquest of Elysium with freed humans from the 3 main regions.
Remember who you are.
Destroy all of the Marble Maiden Tributes.
Kill all Overseers in Elysium.
Collect all the Keeper's Insights in Episode 1.
Defeat Arges, the Bright One
Defeat Steropes the Lightning Bringer.